CFRP布加固广府古建木结构残损箍头榫节点抗震性能研究  

Study on seismic performance of damaged hoop tenon-mortise joints of Guangfu ancient wooden structure strengthened with CFRP strip

作　　者：陈庆军[1,2] 张雨圻 雷浚 黄才茂 江少坤 CHEN Qingjun;ZHANG Yuqi;LEI Jun;HUANG Caimao;JIANG Shaokun(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,China;Engineering Seismic Research Center of Guangdong,Guangzhou 510641,China)

机构地区：[1]华南理工大学土木与交通学院,广东广州510641 [2]广东高校工程抗震技术研究中心,广东广州510641

出　　处：《西安建筑科技大学学报（自然科学版）》2024年第5期642-649,659,共9页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：广东省自然科学基金项目(2021A1515012603)。

摘　　要：采用不同方案的碳纤维(CFRP,Carbon Fiber Reinforced Plastics)布,对6个经过抗震性能试验的残损箍头榫节点试件进行加固,并进行抗震性能试验.结果表明:有3个加固后节点试件的峰值承载能力超越了加固前试件的峰值承载能力,加固后节点的峰值承载力主要与梁榫原始损伤程度及加固量直接相关.加固后节点的初始刚度明显大于加固前的节点,而加固后试件的极限转角普遍小于加固前,但大部分试件极限位移转角均能达到1/21以上,说明此方法加固的节点具有良好的抗震变形能力.加固梁上侧与下侧的CFRP布,对受拉损伤的梁起了重要的补强作用.梁侧面CFRP布在节点区转角较大时退出工作,而L型CFRP布也随着节点转角的增大而逐步退出工作.Six damaged hoop mortise-tenon joint specimens after seismic performance test were strengthened with different schemes of Carbon Fiber Reinforced Plastics(CFRP)strip,and the seismic performance test was carried out.The results show that the peak bearing capacity of three reinforced joint specimens exceeds the peak bearing capacity of the specimens before reinforcement,and the peak bearing capacity of the reinforced joints is mainly directly related to the original damage degree of the beam tenon and the extent of the applied strengthening measures.The initial stiffness of the strengthened joints is considerably higher than that of unstrengthened joints,while the ultimate rotation angle of the strengthened specimens is generally smaller than the unstrengthened ones.However,the ultimate displacement angle of most specimens can reach more than 1/21,indicating that the joints strengthened by this method have good seismic deformation ability.The CFRP strip on the top and bottom of the beams plays an important role in strengthening the tensile-damaged beams.The CFRP strip on the side of the beams loses its effect when the rotation angle of the joint area is large,and the L-shaped CFRP strip also gradually loses its effect with the increase of the rotation angle of the joint.

关 键 词：残损木结构 箍头榫 碳纤维增强复合材料 加固 低周反复荷载试验 

分 类 号：TU318[建筑科学—结构工程]